With this A-Head adapter, a Bobike bicycle seat can also be mounted on a bicycle with Ahead headset
Does your bike have an adjustable stem? This remains usable, just like the display or controller of an e-bike. Bobike mounting bracket for A-Head headset, With this bracket a Bobike child seat can be mounted on a bicycle with A-Head headset without any problems. An adjustable stem remains usable and a display or controller of an electric bike can also stay in place. The required mounting space is only 4mm.
Bobike Mini A Head Adapter